<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // var obj = {};
        // // var name = "namekey";
        // var name = "name";
        // obj.one = "baidu";
        // obj[name] = "taobao";
        // // obj["namekey"] = "taobao";
        // // obj.namekey = "taobao";
        // console.log(obj);

        var namekey = "username";
        
    </script>
</body>
</html>